MESON Chess Problem Database

Problem Display
PID: 30950 (8/8/8/3k4/2R1R1n1/8/8/4K2Q w - - 0 1)

Mach, Julius Zdenek

Nedele, 1904

8/8/8/3k4/2R1R1n1/8/8/4K2Q

#2

4 + 2

1276 Lasker's Chess Magazine 1904
785 Het Belgisch Schaakbord (L'Echiquier Belge) 1947
4883 Still More Fun with Chess Miniatures 2002
3713 Snap 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Re2+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxc4!
    • 1.Re3+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxc4!
    • 1.Re8+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxc4!
    • 1.Qh2?
      • threat
        • 2.Qd2#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf2
        • 2.Qe5#
      • 1...Sxh2!
    • 1.Qh5+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Kd6!
    • 1.Qh6?
      • threat
        • 2.Qd2#
        • 2.Qc6#
        • 2.Qe6#
      • 1...Sf6
        • 2.Qd2#
      • 1...Sf2
        • 2.Qc6#
        • 2.Qe6#
      • 1...Se3
        • 2.Qc6#
        • 2.Qe6#
      • 1...Se5
        • 2.Red4#
      • 1...Sxh6!
    • 1.Qh8?
      • threat
        • 2.Qd4#
        • 2.Qd8#
      • 1...Kd6
        • 2.Qd4#
        • 2.Qd8#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf6!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qd3#
      • 1...Kd6
        • 2.Qd3#
      • 1...Sf2
        • 2.Qe6#
        • 2.Qd7#
      • 1...Se3
        • 2.Qe6#
        • 2.Qd7#
      • 1...Se5
        • 2.Red4#

This anticipates 16401(1940)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • R(D);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);::QAR(B)
        • S(a);SBLOCK::R1(D)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • S(a);
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(b);P-FLIGHT::QAR(B)
      • S(a);SBLOCK::R1(D)
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